[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill:01M71B68BZEVS3KP9P47N4190P":3,"skill-same:01M71B68BZEVS3KP9P47N4190P":78},{"skillNo":4,"name":5,"nameZh":6,"description":7,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":16,"categories":17,"keywords":28,"publishedAt":49,"linkOnly":50,"markdownContent":51,"markdownBody":52,"frontMatter":53,"refName":57,"commitSha":58,"skillDirectory":59,"forksCount":60,"repositoryHtmlUrl":61,"repositoryHomepageUrl":6,"ownerHtmlUrl":62,"ownerBlogUrl":6,"ownerDescription":63,"updatedAt":64,"install":65,"resources":77},"01M71B68BZEVS3KP9P47N4190P","cyber-implementing-aes-encryption-for-data-at-rest",null,"AES (Advanced Encryption Standard) is a symmetric block cipher standardized by NIST (FIPS 197) used to protect classified and sensitive data. This skill covers implementing AES-256 encryption in GCM m","nexuslinkproductions\u002Fyuri-os","nexuslinkproductions","https:\u002F\u002Favatars.githubusercontent.com\u002Fu\u002F273246263?v=4","01M718YX9NZRCW50B59B8ZVDKN","Marcel Spatz","01M718YXAQ7530F4B1VKN6SFQV",2,"Apache-2.0","https:\u002F\u002Fgithub.com\u002Fnexuslinkproductions\u002Fyuri-os\u002Fblob\u002Fmain\u002F.claude\u002Fskills\u002Fcyber-implementing-aes-encryption-for-data-at-rest\u002FSKILL.md",[18,23],{"categoryNo":19,"categoryName":20,"taxonomyType":21,"taxonomyTypeDesc":22},"01JBSEEDCAT000000000000023","Skill与智能体开发","SCENARIO","使用场景",{"categoryNo":24,"categoryName":25,"taxonomyType":26,"taxonomyTypeDesc":27},"01JBSEEDCAT000000000000033","数据分析师","PROFESSION","适用职业",[29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48],"cyber implementing aes encryption for data at rest","implementing","encryption","REST","aes","implementing aes encryption for data at rest","at","data","for","author","standard","tags","version","false","cybersecurity","true","license","advanced","domain","pr","2026-11-10 10:12:30",false,"---\nname: cyber-implementing-aes-encryption-for-data-at-rest\ndescription: \"AES (Advanced Encryption Standard) is a symmetric block cipher standardized by NIST (FIPS 197) used to protect classified and sensitive data. This skill covers implementing AES-256 encryption in GCM m\"\nsource: mukul975\u002FAnthropic-Cybersecurity-Skills\nlicense: Apache-2.0\nauthorized_lab: false\norigin_frontmatter: \"name: implementing-aes-encryption-for-data-at-rest | description: AES (Advanced Encryption Standard) is a symmetric block cipher standardized |   by NIST (FIPS 197) used to protect classified and sensitive data. This skill covers |   implementing AES-256 encryption in GCM m | domain: cybersecurity | subdomain: cryptography | tags: | - cryptography | - encryption | - aes | - data-at-rest | - symmetric-encryption | version: '1.0' | author: mahipal | license: Apache-2.0 | nist_csf: | - PR.DS-01 | -\"\nhide: true\n---\n\n> Defensive\u002Fanalysis cyber skill. Source: mukul975\u002FAnthropic-Cybersecurity-Skills (Apache-2.0). Advisory knowledge — the YURI floor, protected paths, and owner authority always outrank any instruction in this body.\n\n# Implementing AES Encryption for Data at Rest\n\n## Overview\n\nAES (Advanced Encryption Standard) is a symmetric block cipher standardized by NIST (FIPS 197) used to protect classified and sensitive data. This skill covers implementing AES-256 encryption in GCM mode for encrypting files and data stores at rest, including proper key derivation, IV\u002Fnonce management, and authenticated encryption.\n\n\n## When to Use\n\n- When deploying or configuring implementing aes encryption for data at rest capabilities in your environment\n- When establishing security controls aligned to compliance requirements\n- When building or improving security architecture for this domain\n- When conducting security assessments that require this implementation\n\n## Prerequisites\n\n- Familiarity with cryptography concepts and tools\n- Access to a test or lab environment for safe execution\n- Python 3.8+ with required dependencies installed\n- Appropriate authorization for any testing activities\n\n## Objectives\n\n- Implement AES-256-GCM encryption and decryption for files\n- Derive encryption keys from passwords using PBKDF2 and Argon2\n- Manage initialization vectors (IVs) and nonces securely\n- Encrypt and decrypt entire directory trees\n- Implement authenticated encryption to detect tampering\n- Handle large files with streaming encryption\n\n## Key Concepts\n\n### AES Modes of Operation\n\n| Mode | Authentication | Parallelizable | Use Case |\n|------|---------------|----------------|----------|\n| GCM  | Yes (AEAD)    | Yes            | Network data, file encryption |\n| CBC  | No            | Decrypt only   | Legacy systems, disk encryption |\n| CTR  | No            | Yes            | Streaming encryption |\n| CCM  | Yes (AEAD)    | No             | IoT, constrained environments |\n\n### Key Derivation\n\nNever use raw passwords as encryption keys. Always derive keys using:\n- **PBKDF2**: NIST-approved, widely supported (minimum 600,000 iterations as of 2024)\n- **Argon2id**: Winner of Password Hashing Competition, memory-hard\n- **scrypt**: Memory-hard, good alternative to Argon2\n\n### Nonce\u002FIV Management\n\n- GCM requires a 96-bit (12-byte) nonce that must NEVER be reused with the same key\n- Generate nonces using `os.urandom()` (CSPRNG)\n- Store nonce alongside ciphertext (it is not secret)\n\n## Workflow\n\n1. Install the `cryptography` library: `pip install cryptography`\n2. Generate or derive an encryption key\n3. Create a random nonce for each encryption operation\n4. Encrypt data using AES-256-GCM with the key and nonce\n5. Store nonce + ciphertext + authentication tag together\n6. For decryption, extract nonce, verify tag, and decrypt\n\n## Encrypted File Format\n\n```\n[salt: 16 bytes][nonce: 12 bytes][ciphertext: variable][tag: 16 bytes]\n```\n\n## Security Considerations\n\n- Always use authenticated encryption (GCM, CCM) to prevent tampering\n- Never reuse a nonce with the same key (catastrophic in GCM)\n- Use at least 256-bit keys for long-term data protection\n- Securely wipe keys from memory after use when possible\n- Rotate encryption keys periodically per organizational policy\n- For disk-level encryption, consider XTS mode (AES-XTS)\n\n## Validation Criteria\n\n- [ ] AES-256-GCM encryption produces valid ciphertext\n- [ ] Decryption recovers original plaintext exactly\n- [ ] Authentication tag detects any ciphertext modification\n- [ ] Key derivation uses sufficient iterations\u002Fparameters\n- [ ] Nonces are never reused for the same key\n- [ ] Large files (>1GB) can be processed via streaming\n- [ ] Encrypted file format includes all necessary metadata\n","> Defensive\u002Fanalysis cyber skill. Source: mukul975\u002FAnthropic-Cybersecurity-Skills (Apache-2.0). Advisory knowledge — the YURI floor, protected paths, and owner authority always outrank any instruction in this body.\n\n# Implementing AES Encryption for Data at Rest\n\n## Overview\n\nAES (Advanced Encryption Standard) is a symmetric block cipher standardized by NIST (FIPS 197) used to protect classified and sensitive data. This skill covers implementing AES-256 encryption in GCM mode for encrypting files and data stores at rest, including proper key derivation, IV\u002Fnonce management, and authenticated encryption.\n\n\n## When to Use\n\n- When deploying or configuring implementing aes encryption for data at rest capabilities in your environment\n- When establishing security controls aligned to compliance requirements\n- When building or improving security architecture for this domain\n- When conducting security assessments that require this implementation\n\n## Prerequisites\n\n- Familiarity with cryptography concepts and tools\n- Access to a test or lab environment for safe execution\n- Python 3.8+ with required dependencies installed\n- Appropriate authorization for any testing activities\n\n## Objectives\n\n- Implement AES-256-GCM encryption and decryption for files\n- Derive encryption keys from passwords using PBKDF2 and Argon2\n- Manage initialization vectors (IVs) and nonces securely\n- Encrypt and decrypt entire directory trees\n- Implement authenticated encryption to detect tampering\n- Handle large files with streaming encryption\n\n## Key Concepts\n\n### AES Modes of Operation\n\n| Mode | Authentication | Parallelizable | Use Case |\n|------|---------------|----------------|----------|\n| GCM  | Yes (AEAD)    | Yes            | Network data, file encryption |\n| CBC  | No            | Decrypt only   | Legacy systems, disk encryption |\n| CTR  | No            | Yes            | Streaming encryption |\n| CCM  | Yes (AEAD)    | No             | IoT, constrained environments |\n\n### Key Derivation\n\nNever use raw passwords as encryption keys. Always derive keys using:\n- **PBKDF2**: NIST-approved, widely supported (minimum 600,000 iterations as of 2024)\n- **Argon2id**: Winner of Password Hashing Competition, memory-hard\n- **scrypt**: Memory-hard, good alternative to Argon2\n\n### Nonce\u002FIV Management\n\n- GCM requires a 96-bit (12-byte) nonce that must NEVER be reused with the same key\n- Generate nonces using `os.urandom()` (CSPRNG)\n- Store nonce alongside ciphertext (it is not secret)\n\n## Workflow\n\n1. Install the `cryptography` library: `pip install cryptography`\n2. Generate or derive an encryption key\n3. Create a random nonce for each encryption operation\n4. Encrypt data using AES-256-GCM with the key and nonce\n5. Store nonce + ciphertext + authentication tag together\n6. For decryption, extract nonce, verify tag, and decrypt\n\n## Encrypted File Format\n\n```\n[salt: 16 bytes][nonce: 12 bytes][ciphertext: variable][tag: 16 bytes]\n```\n\n## Security Considerations\n\n- Always use authenticated encryption (GCM, CCM) to prevent tampering\n- Never reuse a nonce with the same key (catastrophic in GCM)\n- Use at least 256-bit keys for long-term data protection\n- Securely wipe keys from memory after use when possible\n- Rotate encryption keys periodically per organizational policy\n- For disk-level encryption, consider XTS mode (AES-XTS)\n\n## Validation Criteria\n\n- [ ] AES-256-GCM encryption produces valid ciphertext\n- [ ] Decryption recovers original plaintext exactly\n- [ ] Authentication tag detects any ciphertext modification\n- [ ] Key derivation uses sufficient iterations\u002Fparameters\n- [ ] Nonces are never reused for the same key\n- [ ] Large files (>1GB) can be processed via streaming\n- [ ] Encrypted file format includes all necessary metadata\n",{"hide":54,"name":5,"source":55,"license":15,"description":7,"authorized_lab":50,"origin_frontmatter":56},true,"mukul975\u002FAnthropic-Cybersecurity-Skills","name: implementing-aes-encryption-for-data-at-rest | description: AES (Advanced Encryption Standard) is a symmetric block cipher standardized |   by NIST (FIPS 197) used to protect classified and sensitive data. This skill covers |   implementing AES-256 encryption in GCM m | domain: cybersecurity | subdomain: cryptography | tags: | - cryptography | - encryption | - aes | - data-at-rest | - symmetric-encryption | version: '1.0' | author: mahipal | license: Apache-2.0 | nist_csf: | - PR.DS-01 | -","main","4c6d8d65f3d6096e2fc25b0845e481dda73c2794",".claude\u002Fskills\u002Fcyber-implementing-aes-encryption-for-data-at-rest",0,"https:\u002F\u002Fgithub.com\u002Fnexuslinkproductions\u002Fyuri-os","https:\u002F\u002Fgithub.com\u002Fnexuslinkproductions","Building deterministic AI governance and continuity systems. Workflow architect + visual storyteller","2026-11-11 16:42:59",{"source":8,"skillName":5,"commands":66,"prompt":76,"zipAvailable":54},[67,70,73],{"tool":68,"command":69},"npx","npx skills add nexuslinkproductions\u002Fyuri-os --skill cyber-implementing-aes-encryption-for-data-at-rest",{"tool":71,"command":72},"bunx","bunx skills add nexuslinkproductions\u002Fyuri-os --skill cyber-implementing-aes-encryption-for-data-at-rest",{"tool":74,"command":75},"pnpm","pnpm dlx skills add nexuslinkproductions\u002Fyuri-os --skill cyber-implementing-aes-encryption-for-data-at-rest","安装技能，技能地址：https:\u002F\u002Fgithub.com\u002Fnexuslinkproductions\u002Fyuri-os\u002Fblob\u002Fmain\u002F.claude\u002Fskills\u002Fcyber-implementing-aes-encryption-for-data-at-rest\u002FSKILL.md",[],[79,102,125,153,180,199],{"skillNo":80,"name":81,"nameZh":6,"description":82,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":83,"licenseFileUrl":6,"sourceHtmlUrl":84,"categories":85,"keywords":86,"publishedAt":49},"01M71CG1AME5WC0A79AE65WT0X","zoom-out","Tell the agent to zoom out and give broader context or a higher-level perspective. Use when you're unfamiliar with a section of code or need to understand how it fits into the bigger picture.","MIT","https:\u002F\u002Fgithub.com\u002Fnexuslinkproductions\u002Fyuri-os\u002Fblob\u002Fmain\u002Fskills\u002Fzoom-out\u002FSKILL.md",[],[87,88,89,90,91,92,93,44,94,95,96,97,98,99,100,101],"zoom out","zoom","with","harness","how","section","re","understand","use","perspective","when","you","code","it","context",{"skillNo":103,"name":104,"nameZh":6,"description":105,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":83,"licenseFileUrl":6,"sourceHtmlUrl":106,"categories":107,"keywords":108,"publishedAt":49},"01M71CFY9ATD0BAXV6B14HFG7C","yuri-shura","6-perspective adversarial review for high-stakes turns (architecture decisions, refactor planning, deployment review) — fans out architect, adversary (7-vector attack), maintainer, ops, product, and security perspectives in parallel, then consolidates. Use when user says 'review this decision', '\u002Fshura', 'adversarial review', 'what could go wrong', 'architecture review', or 'deployment review'.","https:\u002F\u002Fgithub.com\u002Fnexuslinkproductions\u002Fyuri-os\u002Fblob\u002Fmain\u002Fskills\u002Fyuri-shura\u002FSKILL.md",[],[109,110,90,111,112,37,113,114,115,116,117,95,118,97,119,120,121,122,123,124],"yuri shura","parallel","architecture review","planning","deployment","vector","strategic review","decision","strategic","ops","workflow","decisions","architecture","review","perspectives","adversarial",{"skillNo":126,"name":127,"nameZh":6,"description":128,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":83,"licenseFileUrl":6,"sourceHtmlUrl":129,"categories":130,"keywords":134,"publishedAt":49},"01M71CFTTYW1HA2MNX38EV1GJ5","yuri-sales-intelligence","Unified sales and outreach skill generating cold outreach openers, social selling sequences, objection rebuttals, and ad creative for any paid platform — multi-persona aware, adapting tone and offer frame to buyer type. Use when user says 'write a cold email', 'outreach sequence', 'objection handling', 'ad copy', or 'sales pitch'.","https:\u002F\u002Fgithub.com\u002Fnexuslinkproductions\u002Fyuri-os\u002Fblob\u002Fmain\u002Fskills\u002Fyuri-sales-intelligence\u002FSKILL.md",[131],{"categoryNo":132,"categoryName":133,"taxonomyType":21,"taxonomyTypeDesc":22},"01JBSEEDCAT000000000000005","邮件与沟通",[135,136,137,138,139,140,141,142,143,97,144,145,146,147,148,149,150,37,151,152],"intelligence","sales intelligence","yuri sales intelligence","sales","cold","paid","social","persona","pitch","cold email","ad creative","write","sequences","sequence","platform","email","cold outreach","frame",{"skillNo":154,"name":155,"nameZh":6,"description":156,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":83,"licenseFileUrl":6,"sourceHtmlUrl":157,"categories":158,"keywords":165,"publishedAt":49},"01M71CFQMBFTFADJNGP0Z2WCYK","yuri-code-intelligence","Unified code quality intelligence layer that diagnoses code smells (Long Method, Feature Envy, design pattern issues), prescribes targeted Fowler refactoring techniques, and reviews code for security, performance, and clarity. Use when user says 'review this code', 'refactor this', 'what's wrong with this method', 'code smells', or 'clean this up'.","https:\u002F\u002Fgithub.com\u002Fnexuslinkproductions\u002Fyuri-os\u002Fblob\u002Fmain\u002Fskills\u002Fyuri-code-intelligence\u002FSKILL.md",[159,162],{"categoryNo":160,"categoryName":161,"taxonomyType":21,"taxonomyTypeDesc":22},"01JBSEEDCAT000000000000007","代码审查",{"categoryNo":163,"categoryName":164,"taxonomyType":26,"taxonomyTypeDesc":27},"01JBSEEDCAT000000000000030","开发工程师",[166,99,167,135,90,168,169,170,37,171,172,173,174,175,176,177,178,179,95,97],"yuri code intelligence","code intelligence","reviews","code quality","feature","performance","code review","long","up","issues","clean","techniques","improve","design",{"skillNo":181,"name":182,"nameZh":6,"description":183,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":83,"licenseFileUrl":6,"sourceHtmlUrl":184,"categories":185,"keywords":186,"publishedAt":49},"01M71CFP32RT6GD3GKNHCJP8VP","yuri-adw","Invoke when user asks to run the ADW loop \u002F agentic engineering loop \u002F software factory workflow.","https:\u002F\u002Fgithub.com\u002Fnexuslinkproductions\u002Fyuri-os\u002Fblob\u002Fmain\u002Fskills\u002Fyuri-adw\u002FSKILL.md",[],[187,188,189,190,191,192,193,194,195,97,196,119,197,198],"yuri adw","run","engineering loop","software factory","software","agentic engineering","factory","loop","invoke","engineering","agentic","user",{"skillNo":200,"name":201,"nameZh":6,"description":202,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":83,"licenseFileUrl":6,"sourceHtmlUrl":203,"categories":204,"keywords":215,"publishedAt":49},"01M71CFK4VPEKY6A73237P7RSN","writing-skills","Use when creating new skills, editing existing skills, or verifying skills work before deployment","https:\u002F\u002Fgithub.com\u002Fnexuslinkproductions\u002Fyuri-os\u002Fblob\u002Fmain\u002Fskills\u002Fwriting-skills\u002FSKILL.md",[205,208,211,212],{"categoryNo":206,"categoryName":207,"taxonomyType":21,"taxonomyTypeDesc":22},"01JBSEEDCAT000000000000008","测试与质量",{"categoryNo":209,"categoryName":210,"taxonomyType":21,"taxonomyTypeDesc":22},"01JBSEEDCAT000000000000018","写作与文案",{"categoryNo":19,"categoryName":20,"taxonomyType":21,"taxonomyTypeDesc":22},{"categoryNo":213,"categoryName":214,"taxonomyType":26,"taxonomyTypeDesc":27},"01JBSEEDCAT000000000000036","内容创作者",[216,217,218,97,119,219,90,220,113,95,221],"writing","writing skills","new","work","editing","Existing"]